No. 31 Squadron is a Royal Australian Air Force (RAAF) airbase support squadron. It was formed in August 1942 and disbanded in July 1946 after seeing action against the Japanese in the South West Pacific theatre of World War II. During the war, it operated the Bristol Beaufighter, which it operated in long-range fighter and ground-attack missions.
No. 31 Squadron was re-raised on 1 July 2010 as the unit responsible for providing airbase support services to RAAF Base Wagga. The squadron is designated No. 31 (City of Wagga Wagga) Squadron and forms part of Combat Support Group.